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137 lines
3.6 KiB
Bash
137 lines
3.6 KiB
Bash
# vim:ft=zsh ts=2 sw=2 sts=2 et fenc=utf-8
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################################################################
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# Utility functions
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# This file holds some utility-functions for
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# the powerlevel9k-ZSH-theme
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# https://github.com/bhilburn/powerlevel9k
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################################################################
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# Exits with 0 if a variable has been previously defined (even if empty)
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# Takes the name of a variable that should be checked.
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function defined() {
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local varname="$1"
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typeset -p "$varname" > /dev/null 2>&1
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}
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# Given the name of a variable and a default value, sets the variable
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# value to the default only if it has not been defined.
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#
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# Typeset cannot set the value for an array, so this will only work
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# for scalar values.
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function set_default() {
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local varname="$1"
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local default_value="$2"
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defined "$varname" || typeset -g "$varname"="$default_value"
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}
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# Converts large memory values into a human-readable unit (e.g., bytes --> GB)
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printSizeHumanReadable() {
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typeset -F 2 size
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size="$1"+0.00001
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local extension
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extension=('B' 'K' 'M' 'G' 'T' 'P' 'E' 'Z' 'Y')
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local index=1
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# if the base is not Bytes
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if [[ -n $2 ]]; then
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for idx in "${extension[@]}"; do
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if [[ "$2" == "$idx" ]]; then
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break
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fi
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index=$(( index + 1 ))
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done
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fi
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while (( (size / 1024) > 0.1 )); do
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size=$(( size / 1024 ))
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index=$(( index + 1 ))
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done
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echo "$size${extension[$index]}"
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}
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# Gets the first value out of a list of items that is not empty.
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# The items are examined by a callback-function.
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# Takes two arguments:
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# * $list - A list of items
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# * $callback - A callback function to examine if the item is
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# worthy. The callback function has access to
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# the inner variable $item.
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function getRelevantItem() {
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setopt shwordsplit # We need to split the words in $interfaces
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local list callback
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list=$1
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callback=$2
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for item in $list; do
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# The first non-empty item wins
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try=$(eval "$callback")
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if [[ -n "$try" ]]; then
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echo "$try"
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break;
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fi
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done
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}
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# OS detection for the `os_icon` segment
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case $(uname) in
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Darwin)
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OS='OSX'
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OS_ICON=$(print_icon 'APPLE_ICON')
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;;
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FreeBSD)
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OS='BSD'
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OS_ICON=$(print_icon 'FREEBSD_ICON')
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;;
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OpenBSD)
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OS='BSD'
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OS_ICON=$(print_icon 'FREEBSD_ICON')
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;;
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DragonFly)
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OS='BSD'
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OS_ICON=$(print_icon 'FREEBSD_ICON')
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;;
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Linux)
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OS='Linux'
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OS_ICON=$(print_icon 'LINUX_ICON')
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;;
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SunOS)
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OS='Solaris'
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OS_ICON=$(print_icon 'SUNOS_ICON')
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;;
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*)
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OS=''
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OS_ICON=''
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;;
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esac
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# Determine the correct sed parameter.
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#
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# `sed` is unfortunately not consistent across OSes when it comes to flags.
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SED_EXTENDED_REGEX_PARAMETER="-r"
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if [[ "$OS" == 'OSX' ]]; then
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local IS_BSD_SED="$(sed --version &>> /dev/null || echo "BSD sed")"
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if [[ -n "$IS_BSD_SED" ]]; then
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SED_EXTENDED_REGEX_PARAMETER="-E"
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fi
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fi
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# Print a deprecation warning if an old segment is in use.
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# Takes the name of an associative array that contains the
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# deprecated segments as keys, the values contain the new
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# segment names.
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print_deprecation_warning() {
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typeset -AH raw_deprecated_segments
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raw_deprecated_segments=(${(kvP@)1})
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for key in ${(@k)raw_deprecated_segments}; do
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if [[ -n "${POWERLEVEL9K_LEFT_PROMPT_ELEMENTS[(r)$key]}" ]] || [[ -n "${POWERLEVEL9K_RIGHT_PROMPT_ELEMENTS[(r)$key]}" ]]; then
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# segment is deprecated
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print -P "%F{yellow}Warning!%f The '$key' segment is deprecated. Use '%F{blue}${raw_deprecated_segments[$key]}%f' instead. For more informations, have a look at the CHANGELOG.md."
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fi
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done
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}
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